void setup()
{
  volatile char *dirf,*outf;
  volatile char *dirk,*ink;
  dirf=0x30; outf=0x31;
  dirk=0x107; ink=0x106;
  *dirf=0xFF; *ink=0x00;
  volatile char switches;
  volatile long arr[]={63,6,91,79,102,109,125,7,127,111};
  volatile long i,j,k,count=8;
 loop: while(1)
  {
    *outf=arr[9];
    switches=*ink;
    if((switches & 2) == 2)
    {
      *outf=arr[count];// to display
      for(j=0;j<=200000;j++);// delay to watch numbers 
      count--;// decrementing count value for array element access
      if(count==-1) count=8;// reinitializing count to 8 to restart
       goto loop;
    }
  }
}

void loop()
{

}